@article{CMUC_1982__23_3_a4,
     author = {Murphy, Gerald J.},
     title = {Self-dual subnormal operators},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {467--473},
     publisher = {mathdoc},
     volume = {23},
     number = {3},
     year = {1982},
     mrnumber = {677855},
     zbl = {0505.47014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1982__23_3_a4/}
}